Trolley guard for tunnels



c. T.Y vWHALEY.

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Speecaton of Letters Patent. Paliggn'd play 16,1922

Appiicanon inea october i?, i921.y semaine. 508,052.

Virginia, have invented certain new anduset'ul Improvements in'Trolley Guards for rIunnels, ot which the following is a specilication.

This invention relates to overhead trolley guards and has special reference to a tunnel guard for trolleys.

One important object of' the invention is the provision ot an improved and simple device tor guiding the wheel of an overhead trolley through a tunnel inA such a manner as to positively prevent any possibility of the trolley becoming displaced from the guide in the tunnel. i

L second important object ot the invention is the provision of an improved arrangement or this character particularly adapted to be applied to the trolley wires ot electric railways without in any way altering the position ot such wires. l

lilith the above and other objects in view, the invention consist-s in general ot certain novel details ot construction and combinations ot' parts hereinafter fully described, illustrated in the accompanying drawings, and speciically claimed.

1n the accompanying drawings, like characters of reference indicate like parts in the several views, and:-

Figure 1 is a perspective view ot a tunnel entrance showing the improved guide or guard in position.

Figure 2 is a perspective view on a large scale of a portion o' this improved guide or guard in a slightly iiiodiinied form.

Figure 3 is a transverse section of the guard shown in Figure 1.

" Figure el is a detail view showing a portion ot the side ot Figure 3.

Figure 5 is a detail section on the line 5-5 ot Figure 3.

Figure G is a plan view showing a curved arrangement ot' guard.

In the embodiments ot the invention herein illustrated two forms are shown. 1n

he torni shown in Figures 1, B, and el, the guard is built up ot three distinct members iwith suitable clips to hold them in position. 1n this torm there is provided a clip having a horizontal. portion 10 provided at each end with eyes 11 for the suspension wires ot the device. Vthe wires 12 may be attached to poles 13 orto suitable eyes or -hangersf'l/l within the tunnel. Depending Afrom the horizontal portion 10 are downwardly eX- tending legs 15 and these legs carry parallel vertical side members 16 secured to the legs by bolts 17. These side members are so arranged that the distance between the side members is slightly greater than the vwidth of a trolley wheel W. Secured to the central portion of the clip top 10 by bolts 18 is a top member 19 having a longitudinally eX- tending trough 2O receiving the trolley wire TV', the wire being held in the trough by the top member of the clips. At each end ot the structure the member 19 is tapered upward as at 21 so that a trolley wheel approaching the guard on the wire lV will roll off this wire into the trough without shock or jar.

1n the form of the device shown in Figure 2 the guard has its sides 22 and top 23 formed integral, the top being provided, as

in the other case with a trough 24 Jfor the reception oiE the trolley wire wW. ln this case the trolley wire is held in the trough by means ot suitable transverse clips 25 secured over the wire by bolts 26. Formed integrally with the guard are suspension ears 27 to which the wires 12 may be connected as in the other case.

lt is to be observed that in each instance the structure is of an inverted channel shape with the web of the channel bulging downward centrally, 1t is also to be observed that this downwardly bulged web is engaged by the flanges ot the trolley wheel lV and by reason ot its shape the trolley wheel is held centrally of the channel.

There has thus been provided a simple and etcient device ot the kind described and for the purpose specified.

Having thus described the invention,what is claimed asnew, is:

1. 1n a device of the kind described, a guard member consisting of an inverted channel having its sides spaced to receive a v trolley wheel between them, the web ot the channel being downwardly concave between said sides to provide contact means for the flanges of the trolley wheel.

2. ln a device oit the kind described, a guard member consisting ot an inverted channel haring its sides spaced to receive a trolley wheel between them, the web of the channel being downwardly concave between said sides to provide contact means for the ianges ot the trolley wheel, the upper tace ranged in spaced relation and supported on the legs of said clips and a top plate supported between the legs of said clip and provided with a transversely convex under surface anda trolley Wire receiving trough in its upper surface, the central portion of the clip extending across said trough to constitute retaining inea-ns for the Wire.

In testimony whereof I aHiX my signature. 20

oYRUs T. WHALEY. 

